Chef Marcella Hazan's Amatriciana – Tomato Sauce with Pancetta and Chili Pepper

Excerpted from Essentials of Classic Italian Cooking by Marcella Hazan. Copyright © 1992 by Marcella Hazan. Excerpted by permission of Alfred A. Knopf, a division of Penguin Random House LLC. All rights reserved. No part of this excerpt may be reproduced or reprinted without permission in writing from the publisher.